If you dreamed that your friend had lung cancer: You shouldn't hurt yourself with your overly assertive attitudes, You may be in search of change due to old relationships. To see that your friend has lung cancer in a dream is one of the serious diseases that generally result in death. To see a friend caught in this disease in a dream means that, contrary to the dream, this person will find healing and lead a quality life by getting rid of the existing sorrow and grief.